Unit4 Astronomy

Unit4 Astronomy:the science of the stars(warming up and reading)

Goals

1. to enable the students to talk about Astronomy and origin of life on earth. 2. to improve the students’ reading ablities of scanning and skimming -Lead-in questions to the topic of this unit

1. In our solar system eight planets circle around the sun What are their names? 2.Do you know any questions that astronomers are interested in? Pre-reading

1.The origin of life on earth is a question that interests astronomers. What do you know about it?

2.There are several ideas about the origin of life on earth and the idea in our passage is only one of them . Reading

I. Read the passage carefully and match the main idea with each paragraph. Para. 1 The formation(形成) of the earth.

Para. 2 The importance of water for life.

Para. 3 A widely accepted theory about the formation of the universe. Para. 4 The arrival of humans and their impact on the earth. Para. 5 The development of plants and animals on the earth. 1.What are the three fundamental elements for

us human beings to survive on the earth?Why was the earth different from other planets?

3.Why do scientists think there has never been life on the moon? 4.Why did green plants help life to develop?

5.There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of that planet? Do you know why they removed it? 6.What problem is caused by human beings? Post-reading

Work in groups and discuss what impact human beings have on earth.,such as global warming.and get them to talk about the causes of global warming.

Unit4 language points

Goals

1. to master the following words and expressions:in time;unlike;multiply;in turn;prevent…from;exist;puzzle;atmosphere; now that.

2. to enable the students to analyse and understand complex sentences especially noun clauses观察in time的用法并总结 They were in time to produce the water..( ). I’ll see him in time.( )

She will be back in time to prepare dinner.( ) 与time相关的短语:

in no time( ) at times( ) at a time ( ) once upon a time ( )

on time ( ) at one time ( ) for the time being from time to time ( ) at no time ( )

阅读下面句子, 注意prevent ... from的意思和用法。

They are putting too much carbon dioxide into the atmosphere, which prevents

heat from escaping from the earth into space. 想一想还有其他表达方式吗？请用别的表达方式来替代划线部分 1. There was nothing to prevent her from doing so. 3. We must prevent the water from being polluted. 观察下面turn短语的用法,翻译划线部分

Thus they have,in their turn,become the most important animals on the planet. 1. The students were taking turns reciting the text. 2. My brother and I usually take turns to cook. 3. I think it’s your turn to do your duty. 4. Each of us in turn had to give a brief introduction to ourselves. 5. Increased production will ,in turn, lead to increased profits. 分析下面的复杂句并把他们翻成汉语

1.The earth became so violent that it was not clear whether the shape would last or not.

2.whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 用下面单词的适当形式填空

1.Our problems have _________ (multiply) since last year.

2. Scientists want to know whether life ______ (exist) on other planets. 3. She listened with a _______ (puzzle) expression on her face. The car came to a stop just i___ time to prevent an accident.

He usually comes to school early. It’s very _u_____ him to be so late todayA knowledge of physics is f___ to any understanding of this problem. In the teacher’s class, the students often answer his questions _i__ turn. What can we do to keep the disease _f_____ spreading? 根据汉语提示填入合适单词

1.The new owners have tried to give the restaurant a more family-friendly __________ (气氛).

2. （氧气）_____ is a kind of gas that is necessary for most animals and plants to live.

3.. I was surprised by the _________ (出席) of so many people at the meeting. 4.The best way to get that _________ (二氧化碳) into the atmosphere is to warm the entire planet.

把下面句子翻译成汉语

新鲜空气对于身体健康必不可少。(be fundamental to ...) 他不知如何回这封信。(puzzle)

现在轮到我们学会如何与别人相处了。(in one’s turn)

你迟早会成功的。( in time)既然你已经长大了，你自己决定吧.(now that)

Unit4 Grammar–––Noun clause(=)【寻规找矩】请观察下列句子, 注意主

语从句的用法。

1. That the earth travels round the sun is a well-known fact. 2. It is uncertain whether the artist can do it or not.

3. Who will act the lead in the play has not been decided yet. 4. Where the young man has gone is not known.

5. It is not yet decided when and where the test will be given.

【常见错误展示】下列各句均有一处错误，请改正并分析错误的原因。 1. Light travels faster than sound is common knowledge. 2. If she’s coming or not doesn’t matter much. 3. That the professor said is of great importance. 4. Where will the trees be planted has not been decided. 5. No matter who breaks the rule will be punished.

6. When and where the meeting will be held still remain a question. 6. What were your problems a year ago has now become mine. Choose the best answers

1. ____ wants to stay in a hotel has to pay their own way. (浙江 2008)

A. Anyone B. The one C. Whoever D. Who

2. ____ matters most in learning English is enough practice.(2007 全国卷Ⅱ) A. What B. Why C. Where D. Which

3. ____ fashion differs from country to country may reflect the cultural differences from one aspect. (上海 2002 春) A. What B. That C. This D. Which

4. ____ we’ll go camping tomorrow depends on the weather. (NMET 1996)

A. If B. Whether C. That D. Where

5. After Yang Liwei succeeded in circling the earth, ___ our astronauts desire to

do is walk in space. (2004 上海)

A. where B. what C. that D. how

6.The other day, my brother drove his car down the street at __ I thought was a dangerous speed. (2004 上海)

A. as B. which C. what D. that 7. ___ I need is more time.

A. That B. What C. / D. Which8. ___ he has become a rich man is known to all in our town. [高考真题]

A. Because B. That C. / D. What用适当的单词填空，使下列主语从句意思完整。

1. _______ he finished writing the composition in such a short time surprised us all.

2. _______ we will go for an outing tomorrow remains unknown.

3. It is a pity ______ we won’t be able to go to the south to spend our summer holidays.

4. _______ she is coming or not doesn’t matter too much. 5. _______ he came from still puzzles all of us.

6. It happened _____ I saw him yesterday.

7. It does not make any difference to me ______ you do. 8. _____ was responsible for the accident is not yet clear. 9. _______ they will have the sports meet is still a question. 10. It doesn’t matter ______ she looks like.

Unit4.speaking and writing

If I visited the moon,here is a problem I might have:how to stop my food ____away.

Iwould have to take all my food with me .In the spaceship ther e is no _____so the food would _____around if it was ____.So I would make sure that it is specially made as _____space food.

It could be put in a _____and then I would be able to eat it more easily. Perhaps I would use a _____ to eat it . It would solve the problem.

WRITING TIPS

“迎”难而上 文体介绍

英语写作中的Expository writing 指的是说明文。说明文是阐述或解释某一事物或者问题的发生、发展、结果、状态等的文体，提供事物或者问题的 What, Why, How等方面的知识，从而让读者把该事物或问题弄明白。

在我们的人生历程中，难免会遇到种种困难和挫折。当我们碰到这些“绊脚石”的时候，不要畏缩，要想方设法战胜它们。下面我们就结合说明文的文体特点写一篇题为“How I Overcome Difficulties in Learning English”的英语短文。 任务聚焦

你是怎样克服困难学好英语的？ ①你在英语学习中有哪些困难？ ②你是如何克服这些困难的？ 激活大脑

要想写好这类作文，我们需要注意以下几点：

1． 存在的困难。在短文的第一段就应该写出 “我”在英语学习中存在的问题，比如受家乡话发音的影响，鼻音“n”和非鼻音“l”不分；记忆力差，很难扩大词汇量；阅读速度慢，不能在规定的时间内把试题做完等。

2． 采取的措施。在第二段中，要简单说明“我”是如何克服这些困难的。